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BHE
Prof. Diego C. Iocca
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MITOSE
Diego C. Iocca
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Ciclo Celular
Diego C. Iocca
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DNA
Diego C. Iocca
DUPLICAÇÃO do DNA
FASE S
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MITOSE
46
46 46
2n / diplóide
2n / diplóide
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MITOSE
Divisão nuclear ecitoplasmática
Diego C. Iocca
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Divisão Nuclear
PROFASE Condensamento das fibras de cromatina (DNA já duplicado);
DNA duplicado = 2 cromátides unidas no centromero;
Formação do Fuso Mitótico
Unem o Centrossomo ao CENTROMERO (DNA)
Decomposição do Nucléolo e da Membrana Nuclear (carioteca)
METÁTASE
ANÁFASE
TELÓFASE
Diego C. Iocca
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Divisão Nuclear
PROFASE METÁTASE
ANÁFASE
Separação das cromátides de cada cromossomo;
Migração das cromátides para os polos celulares; TELÓFASE
Diego C. Iocca
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Divisão Nuclear
PROFASE METÁTASE
ANÁFASE
TELÓFASE
Cromossomos se desenrolam contituindo a cromatina; Surgimento do nucléolo e membrane nuclear (carioteca);
Desintegração dos fusos mitóticos.
Diego C. Iocca
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IMPORTÂNCIA DAMITOSE
Diego C. Iocca
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MEIOSE
Diego C. Iocca
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Meiose I
PROFASE I
METÁTASE I
ANÁFASE I
TELÓFASE I
Meiose II O que acontece em cada etapa é igual a MITOSE!!!
PROFASE II
METÁTASE II
ANÁFASE II
TELÓFASE II
Diego C. Iocca
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MEIOSE I
n / haplóide / cromossomo simples
46
23 23
2n / diplóide / cromossomo duplicado
23 2323 23
MEIOSE II
n / haplóide
cromossomo duplicado
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Meiose I
PROFASE I Permuta de material genético (crossing-over );
METÁTASE I
Alinhamento do PAR de cromossos homólogos e não de cadacromossomo;
Placa de metáfase
ANÁFASE I
Separação dos cromossomos homólogos e não das cromátidesirmãs;
TELÓFASE I
Diego C. Iocca
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Meiose I
PROFASE I
Permuta de material genético (crossing-over );
Diego C. Iocca
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IMPORTÂNCIA DAMEIOSE
Diego C. Iocca
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Por hoje é só, pessoal!!!
Di C I